Finding the Fourth Proportional to 120.18, 180.11 and 51.68
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Solution
The fourth proportional to 120.18, 180.11 and 51.68 is: 77.45
Step by Step Solution
- Step 1: Write the proportion equation
120.18 : 180.11 = 51.68 : x - Step 2: Convert to fraction form
120.18/180.11 = 51.68/x - Step 3: Cross multiply
120.18x = 180.11 × 51.68 - Step 4: Simplify right side
120.18x = 9,308.08 - Step 5: Solve for x
x = 9,308.08/120.18 - Step 6: Final answer
x = 77.45
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.